Investigators have been looking at gas meters and pipelines as they try to figure out what happened Saturday night when a blast killed two people, obliterated two homes and left dozens more uninhabitable.

Gen. John Allen, the top US commander in Afghanistan, is now the subject of an FBI investigation for alleged "inappropriate communications" with Jill Kelley, a married socialite in Florida. Gen. John Allen denies any wrongdoing.

The owner of one of the homes that exploded Saturday night in an Indianapolis neighborhood said their furnace had been acting up recently. Authorities have not yet determined the cause of the explosion, which killed two people.

New forecasts by the International Energy Agency predict the US may achieve energy independence by 2017. America is expected to surpass Russia as the largest gas producer by 2015, and Saudi Arabia as the world's top oil producer by 2017.

Two high-profile Senators from across party lines are re-starting talk of immigration reform. Senators Charles Schumer, a Democrat, and Senator Lindsey Graham, a Republican, have a four-part plan that includes a path to citizenship for undocumented immigrants.

Two people were killed, four were injured, and 200 evacuated after a powerful explosion in an Indianapolis neighborhood. Two neighboring homes were destroyed in the blast. Authorities are searching for a cause.

New York City Mayor Michael Bloomberg announced gasoline rationing in the five boroughs, starting early Friday morning, along with Long Island. In the meantime, power crews are slowly getting electrical power restored.

In an interview with ABC, Republican Representative John Boehner suggested he will not prioritize the repeal of the healthcare law to the extent that he has in the past. But following the interview, a spokesman for Boehner said repealing the law 'would be on the table.'

Jared Loughner, the man who killed six and wounded 13 in an Arizona shooting spree, was sentenced to life in prison without parole on Thursday. Former U.S. Representative Gabrielle Giffords attended the hearing, but did not speak.